Snap fastener



FIG. 1 is a side elevational view of a snap fastener showing my new design;

FIG. 2 is a side elevational view of the same, taken from the side opposite that shown in FIG. 1;

FIG. 3 is an end elevational view of the larger end of same;

FIG. 4 is an end elevational view of the same, taken from the end opposite that shown in FIG. 3;

FIG. 5 is a top plan view of the same; and

FIG. 6 is a bottom plan view of the same. 

The ornamental design for a snap fastener, as shown and described. 